Development of Plantar Pressure Distribution Measurement Shoe Insole with Built-in Printed Curved Sensor Structure

Fekiri, Chaima; Kim, Ho-Chan; Lee, In Hwan

doi:10.1007/s12541-022-00637-y

Cited by 9 publications

(1 citation statement)

References 17 publications

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“…Overall, these studies demonstrate that the gait pressure dissemination is higher within the heel and forefoot when standing, then shifts to the whole foot and finally to the forefoot during the first occurrence of the gait cycle. Jung et al proposed a foot pressure measurement method using printed flexible piezoresistive sensors [44]. In that work, the sensing parts of the gait insole were created through a carbon-based composite.…”

Section: Introductionmentioning

confidence: 99%

Gait Pattern Analysis: Integration of a Highly Sensitive Flexible Pressure Sensor on a Wireless Instrumented Insole

Das,

Skaf,

Rose

et al. 2024

Sensors

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Gait phase monitoring wearable sensors play a crucial role in assessing both health and athletic performance, offering valuable insights into an individual’s gait pattern. In this study, we introduced a simple and cost-effective capacitive gait sensor manufacturing approach, utilizing a micropatterned polydimethylsiloxane dielectric layer placed between screen-printed silver electrodes. The sensor demonstrated inherent stretchability and durability, even when the electrode was bent at a 45-degree angle, it maintained an electrode resistance of approximately 3 Ω. This feature is particularly advantageous for gait monitoring applications. Furthermore, the fabricated flexible capacitive pressure sensor exhibited higher sensitivity and linearity at both low and high pressure and displayed very good stability. Notably, the sensors demonstrated rapid response and recovery times for both under low and high pressure. To further explore the capabilities of these new sensors, they were successfully tested as insole-type pressure sensors for real-time gait signal monitoring. The sensors displayed a well-balanced combination of sensitivity and response time, making them well-suited for gait analysis. Beyond gait analysis, the proposed sensor holds the potential for a wide range of applications within biomedical, sports, and commercial systems where soft and conformable sensors are preferred.

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Section: Introductionmentioning

confidence: 99%

Gait Pattern Analysis: Integration of a Highly Sensitive Flexible Pressure Sensor on a Wireless Instrumented Insole

Das,

Skaf,

Rose

et al. 2024

Sensors

View full text Add to dashboard Cite

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Robust Gait Event Detection Based on the Kinematic Characteristics of a Single Lower Extremity

Kim

Lee

Kim

et al. 2023

Int. J. Precis. Eng. Manuf.

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Ankle Foot Orthosis for Patients with Drop Foot Using Shape-Memory-Alloy Actuators

Lee,

Park,

Park

et al. 2023

Int. J. Precis. Eng. Manuf.

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Gait disorders can lower the quality of life of patients. Drop foot, a causative factor of deviated gait patterns, renders patients unable to lift their forefoot towards the body. Hence, a light and compact ankle–foot orthosis (AFO), which is the most common treatment for drop foot, must be designed, especially for patients with impaired lower limb muscles as oxygen consumption increases by 30% per 1.96 N load on their foot. Furthermore, the limited range of ankle angles in the first 10% of the gait cycle (GC) is a major drawback for patients with drop foot compared to healthy individuals. This limited range of ankle angles can be improved by gaining support from an AFO composed of shape memory alloy (SMA) actuators (SMA-AFO). Therefore, in this study, an SMA was used to fabricate a soft actuator to reduce the weight of the AFO. An adaptive frequency oscillator (AO) was implemented in real time for continuous gait phase detection. Walk tests were performed on a treadmill with the SMA-AFO attached to the participants (N = 3). The experimental results showed that the participants could lift their forefoot in the dorsiflexion direction with an ankle angle of 8.75° in the first 10% of the GC. Furthermore, the current required to operate the SMA actuator can be supplied to only 45.3% of the GC, reducing the power consumption. Therefore, the proposed SMA-AFO can be used in patients with drop foot.

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Development of Plantar Pressure Distribution Measurement Shoe Insole with Built-in Printed Curved Sensor Structure

Cited by 9 publications

References 17 publications

Gait Pattern Analysis: Integration of a Highly Sensitive Flexible Pressure Sensor on a Wireless Instrumented Insole

Gait Pattern Analysis: Integration of a Highly Sensitive Flexible Pressure Sensor on a Wireless Instrumented Insole

Robust Gait Event Detection Based on the Kinematic Characteristics of a Single Lower Extremity

Ankle Foot Orthosis for Patients with Drop Foot Using Shape-Memory-Alloy Actuators

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